Just adding a note that this does still occur under 14.04, to which I recently upgraded. Naturally this was to be expected, given that the issue first occurred after switching to the Trusty HWE pack in 12.04.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1345573 Title: Horizontal lines flashing on screen briefly Status in xorg package in Ubuntu: Expired Bug description: Since upgrading HWE from -lts-saucy to -lts-trusty, I have had recurring graphical glitches on screen, with short black horizontal lines appearing briefly on screen (on top of normal contents), particularly when switching between applications. The lines appear only for a few 100 ms before going away (just enough to register in your eye that there's something there), so I've been trying to make a screen recording to capture it, but of course the phenomenon goes away when I do (perhaps RecordMyDesktop does something with the screen that makes it less likely to appear). I don't recall seeing this with -lts-saucy or other previous Xorg packages. It was so obvious right after upgrading that either it never occurred before or was so rare or quick to flash away that it didn't register. --- .tmp.unity.support.test.0: ApportVersion: 2.0.1-0ubuntu17.9 Architecture: amd64 CompizPlugins: [core,composite,opengl,compiztoolbox,decor,gnomecompat,snap,imgpng,unitymtgrabhandles,move,place,grid,resize,mousepoll,vpswitch,regex,winrules,wall,session,animation,workarounds,expo,ezoom,fade,scale,unityshell] CompositorRunning: compiz DistUpgraded: 2014-07-11 11:04:24,254 DEBUG running doUpdate() (showErrors=True) DistroCodename: precise DistroRelease: Ubuntu 12.04 DistroVariant: ubuntu DkmsStatus: vboxhost, 4.3.28, 3.13.0-53-generic, x86_64: installed ExtraDebuggingInterest: Yes, GraphicsCard: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0162] (rev 09) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device [1043:84ca] InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027) MachineType: System manufacturer System Product Name MarkForUpload: True Package: xorg 1:7.6+12ubuntu2 PackageArchitecture: amd64 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-53-generic root=UUID=28b993a2-7b5f-45fb-9062-173b0759a0ee ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.13.0-53.89~precise1-generic 3.13.11-ckt19 Tags: precise running-unity ubuntu compiz-0.9 Uname: Linux 3.13.0-53-generic x86_64 UpgradeStatus: Upgraded to precise on 2014-07-11 (318 days ago) UserGroups: adm bluetooth cdrom dip lpadmin plugdev sambashare ssh sudo vboxusers dmi.bios.date: 10/17/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1505 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: P8H77-M PRO dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1505:bd10/17/2014:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8H77-MPRO:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer version.compiz: compiz 1:0.9.7.12-0ubuntu4 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.52-1~precise2 version.libgl1-mesa-dri: libgl1-mesa-dri N/A version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core N/A version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1345573/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
